re-enable Prettier check for codex-cli in CI (#417)

This check was lost in https://github.com/openai/codex/pull/287. Both
the root folder and `codex-cli/` have their own `pnpm format` commands
that check the formatting of different things.

Also ran `pnpm format:fix` to fix the formatting violations that got in
while this was disabled in CI.

---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/openai/codex/pull/417).
* #420
* #419
* #416
* __->__ #417

codex-cli/src/components/chat/terminal-chat.tsx

@@ -300,15 +300,10 @@ export default function TerminalChat({
       agentRef.current = undefined;
       forceUpdate(); // re‑render after teardown too
     };
-  // We intentionally omit 'approvalPolicy' and 'confirmationPrompt' from the deps
-  // so switching modes or showing confirmation dialogs doesn’t tear down the loop.
-  // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [
-    model,
-    config,
-    requestConfirmation,
-    additionalWritableRoots,
-  ]);
+    // We intentionally omit 'approvalPolicy' and 'confirmationPrompt' from the deps
+    // so switching modes or showing confirmation dialogs doesn’t tear down the loop.
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [model, config, requestConfirmation, additionalWritableRoots]);
 
   // whenever loading starts/stops, reset or start a timer — but pause the
   // timer while a confirmation overlay is displayed so we don't trigger a
@@ -597,7 +592,11 @@ export default function TerminalChat({
               setApprovalPolicy(newMode as ApprovalPolicy);
               // update existing AgentLoop instance
               if (agentRef.current) {
-                (agentRef.current as unknown as { approvalPolicy: ApprovalPolicy }).approvalPolicy = newMode as ApprovalPolicy;
+                (
+                  agentRef.current as unknown as {
+                    approvalPolicy: ApprovalPolicy;
+                  }
+                ).approvalPolicy = newMode as ApprovalPolicy;
               }
               setItems((prev) => [
                 ...prev,